ACPM-7051

Reliability Data Sheet

Description

The ACPM- 7051 is a multiband multimode PA which sup-

ports GMSK and 8-PSK modulation schemes and UMTS

bands 1 and 5. There are two amplifier chains, one is to

support low band (GSM850/900 and UMTS Band5), and

the other is to support high band (DCS1800/PCS1900 and

UMTS band1).

CoolPAM technology, Avago Technologies’ Power Ampli-

fier technologies, provides extended talk time with ex-

tremely low quiescent current and enhanced efficiency at

low and medium power modes.

Reliability Prediction Model

Failure rate predictions are based on HTOL test results.

The prediction uses an exponential cumulative failure

function (constant failure rate) as the reliability predic-

tion model to predict failure rate and mean time to failure

(MTTF) at various temperatures as shown in Table 2. The

wear out mechanisms is therefore not considered. The

Arrhenius temperature de-rating equation is used. We as-

sume no failure mechanism change between stresses and

use conditions. Bias and temperature are alterable stress-

es and must be considered with the thermal resistance of

the devices when determining the stress condition. The

failure rate will have a direct relationship to the life stress.

The failure rate prediction was calculated using activation

energy of 1.58eV as a conservative estimate. Confidence

intervals are based upon the chi-squared prediction

method associated with exponential distribution.

Table 1. Life prediction:

Demonstrated Performance

Test Name

Stress Condition

Total Units Tested

Total Device Hours

Number of Failed Units

DC-High Temperature

Operating Life

Tjunction=150

°C

75

37800 hrs

0/75

Table 2. Estimated for Various Channel Temperatures are as follows:

Channel Temp.

(

°C)

Point Typical Performance

MTTF (yrs/failure)

90% Confidence

MTTF (yrs)

Point Typical

Performance FIT

90% Confidence

FIT

150

4.31

1.87

26455.03

60978.84

125

65.64

28.48

1737.88

4005.81

100

1439.39

624.46

79.25

182.68

85

11289.53

4897.84

10.10

23.29

60

527941.41

229041.83

0.22

0.50

Point typical MTTF is simply the total device hours divided by the number of failures. Since no failures were observed, the point

estimate is calculated under the assumption that one unit failed. FIT rates shown are relatively high due to the limited device hours

at product release.